GAIL has been shortlisted by Ethiopia's ministry of mines and energy to participate in the bidding process for exploration and development of Calub and Hilala gas fields in Ogaden onland basin, Ethiopia.According to an official release issued by GAIL to the BSE, the company had submitted its 'expression of interest' along with Gujarat State Petroleum Corporation (GSPC). The two gas fields are remotely located and commercial exploitation of the reserves would need setting up of processing facilities and a long distance pipeline to reach the potential markets. As these activities were within the GAIL's core competence and operations, it would participate in the bidding process with full interest, the release said.The bids are due for submission by June 10.